Excavation and Research in Wales and the Marches' began a program of excavations led by Robert Carr Bosanquet, including a corner turret of the fortress walls, a building near the Church, and in 1908 a preliminary excavation of the Amphitheatre, revealing some well-preserved walls and buttresses. The Archaeologists 1926-27: Amphitheatre. Since 1913 there had been a ‘Caerleon Amphitheatre Fund’, although it is unclear if this was a local initiative to try and get national funds or an external initiative to circumvent local inaction. However, after the 1914-18 war it reformed as the ‘Caerleon Excavation Committee’ and gained momentum under the dynamic leadership of Mortimer Wheeler, recently appointed director the National Museum of Wales. It was able to acquire the amphitheatre site, and in 1926 work began on removing 30,000 tones of soil. Over 14 months, and under three different supervisors, they were able to expose the whole of the original flooring, entrances, retaining walls and banks of seating areas. First supervisor was V. E. Nash-Williams, who had worked with Mortimer Wheeler at Segontium. Mr Myers took over for 4 months, and for the remaining 8 months it was supervised by Mrs TC Wheeler, Mortimer's wife. When the work was completed the site was presented to the Office of Works for preservation as a national monument. 1927-29: Prysg Field was purchased by the Caerleon Excavation Committee and digs over three summers under V. E. Nash-Williams revealed the western corner ramparts and extensive barracks blocks. Following the example of the amphitheatre, the Barracks footings (and reconstructed ground plans) were laid out as public parkland on completion of the excavations. 1929: 'The Mount': C Hawkes (also a veteran of the Segontium dig) began an excavation at ‘The Mount’, acquired that year by Col Atwood Thorne, and made available to the Excavation Committee. This revealed the ramparts at the eastern corner The two 1920s digs confirmed what was until then considered to be a conjectural line for the fortress walls and established a construction sequence of a 75AD ditch with clay rampart, which was faced with stone 25 years later and had a continued occupation until the end of the third century. The Western Barracks buildings had been exposed and showed that the original timber barracks were replaced by stone, around 115 AD. In 1930 the Caerleon Antiquarian Association agreed to lend, and subsequently hand over, their museum to the National Museum of Wales,